| Delaware Route 1 | ||||
|---|---|---|---|---|
|   DE 1 highlighted in red | ||||
| Route information | ||||
| Maintained by DelDOT and USACE | ||||
| Length: | 103.02 mi (165.79 km) | |||
| Existed: | 1974 – present | |||
| History: | Completed in 2003 | |||
| Major junctions | ||||
| South end: |  MD 528 in Fenwick Island | |||
| 
  I‑95 in Christiana | ||||
| North end: |   DE 7 / DE 58 in Christiana | |||
| Location | ||||
| Counties: | Sussex, Kent, New Castle | |||
| Highway system | ||||
| 
 | ||||
| Delaware Route 1A | |
|---|---|
| Location: | Dewey Beach-Rehoboth Beach | 
| Length: | 2.92 mi (4.70 km) | 
| Existed: | 1974–present | 
| Delaware Route 1B | |
|---|---|
| Location: | Rehoboth Beach | 
| Length: | 1.11 mi (1.79 km) | 
| Existed: | 1974–present | 
| Delaware Route 1D | |
|---|---|
| Location: | Midway-Five Points | 
| Length: | 3.3 mi (5.3 km) | 
| Existed: | 1996–present | 
|  Delaware Route 1 Business | |
|---|---|
| Location: | Milford | 
| Length: | 3.90 mi (6.28 km) | 
| Existed: | 1977–present | 

 US 9 / DE 404 in Five Points
US 9 / DE 404 in Five Points US 113 in Milford
US 113 in Milford DE 9 near Dover AFB
DE 9 near Dover AFB US 13 in Dover
US 13 in Dover
 US 13 / DE 896 near Odessa
US 13 / DE 896 near Odessa US 13 in Tybouts Corner
US 13 in Tybouts Corner US 40 in Bear
US 40 in Bear DE 273 near Christiana
DE 273 near Christiana DE 7 in Christiana
DE 7 in Christiana